Improvement in corrugated paper dishes



C'. INGERSOLL.

Corrugated Paper Dish.

10.221,564. Patented Nov. 11, 1879.

UNITED STATES PATENT OEEICE CHALMERS INGERSOLL, OF BELOIT, WISCONSIN,ASSIGNOR TO THE PAPER NOVELTY COMPANY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN CORRUGATED PAPER DISHES.

Specification forming part of Letters Patent No. 221,564, dated November11, 1879; application filed March 14, 1878.

To all whom 'it may concern:

Be it known that I, GEALMERs INGERsoLL, of Beloit, in the county of Rockand State ot' Wisconsin, have invented a new and useful Improvement inCorrugated Paper Dishes, which is fully described in the followingspecification, reference being had to the accom-v depth at any suitableangle.

In the manufacture of grocers7 dishes of paper it has been customary' tocompress the sheets of paper between plain dies, which bend up the edgesforming the sides of the dishes.

Owing to the nature of the material, which is not ductile, like metal,nor plastic, like pulp,

the turning up of the sides either cuts or breaks or distends thematerial, and thereby tears the same or wrinkles it in overlappingfolds, which, owing to their increased thickness, prevent the dies frompressing evenly ou the whole surface of the dish, so that the surfacethereof is rough and irregular, While the pressure of the articlesheldby the dishes will unlap or distend the folds and turn down thesides, bringing the sheets to their original flat form. This isespecially the case when the articles are in liquid form or the dishbecomes dampened.

In the manufacture of expensive and finelynished articles, aswashbasins, platters, and other articles intendedv for permanent use,these difficulties may be overcome or avoided by the molding of pulp asit comes from the engine, or by subsequent glazing or finishingprocesses; but in the production of butterdishes and similar articlesintended as receptacles to be given away with the article sold suchmeans of production and finish are too expensive for practical use. Inorder to correct these defects without any increased cost of production,I make a dish in which the excess of material that results from turningup the edges of asheet to form the flaring sides is taken up by regularfolds or corrugations e without breakin g, distendin g, or overlappn gany part.

The corrugations are deep at the top and vanish at the periphery t ofthe bottom, so that there is no distention of the material at the lowerends of the corrugations.

The amount of surplus material increases in proportion to the angle andheight of the ilaring side from the bottom of the dish. After beingpressed the dish is dried, when it will reta-in permanently the formimparted by the dies.

The character and arrangement of the corrugatious will depend upon theshape and depth of the dish and the inclination of the sides. It isnecessary, however, that the corrugations beginning at the periphery ofthe bottom increase in depth toward the top.

Oblong dishes are best corrugated at the ends, which are made rounded,as shown in Figs. 1 and 2. Circular dishes may be corrugated throughoutthe entire sides.

I claim- The within-described dish, made of a single sheet of paper,with the edges turned up to form sides, with corrugations decreasing indepth toward and vanishing at the periphery of the bottom, substantiallyas set forth.

CHALMERS IN GERSOLL.

Witnesses H. B'; ALLEN, I. N. RAWsoN.

